Flange connection is to fix two pipes, pipe fittings or equipment on a flange, and between the two flanges, with flange pads, bolted together to complete the connection. . Some fittings and equipment have their own flanges and are also flanged. Flange connection is an important connection method for pipeline construction. The flange connection is easy to use and can withstand large pressures. In industrial pipes, in the home, the pipe diameter is small and low pressure, and the flange connection is not visible. If you are in a boiler room or production site, there are flanged pipes and equipment everywhere. [1]
1, according to the connection type of flange connection can be divided into: plate flat welding flange, neck flat welding flange, neck butt welding flange, socket welding flange, threaded flange, flange cover, with neck pair Welding ring loose flange, flat welding ring loose flange, ring groove flange and flange cover, large diameter flat flange, large diameter high neck flange, eight-word blind plate, butt weld ring loose flange, etc. [3] .Forged Flange Suppliers
Welding quality editor
As an iron plate welded flange, many customers question whether the quality of the iron plate welding flange is better than the forged welding flange. In fact, the quality of the iron plate welding flange and the quality of the forged welding flange are the same, but the iron plate welding flange can not be guaranteed in any place, that is, the material of the iron plate welding flange is the most unprotected, because In the general process, the density of the iron plate welding flange is not problematic, but in the process of production, the blank of the iron plate welding flange is rarely detected, so, after the production, it does not pass. The material of the tested iron plate welding flange is not guaranteed. [1]
Welding process editing
Required equipment
Preparation before welding
1. Check the commissioning equipment to ensure the normal operation of the equipment; 2. Prepare the φ4.0J402 electrode for drying for one hour at 300 °C-350 °C.
Welding process
1. Assemble the vertebral body and the large flange according to the requirements of the drawings, and then divide the large flange into 8 equal parts. 2, welding due to the thicker flange, the groove is larger, so the use of segmental symmetry, multi-layer welding.
Weld quality
The weld strength is required to be at least the strength of the base metal. The surface of the weld is smooth and smooth, and there are no defects such as burn through, pores, welds, slag inclusions, undercuts, and insufficient welds. The residual height is less than 2mm.
Precautions
1. When using the J506 electrode, it must be manually surfacing and use small current welding. Welding in strict accordance with the welding process. 2. After each welding position, use a level to clamp the deformation of the flange plane. 3. While welding, hammer the weld with a hammer to achieve the effect of eliminating stress.
Flange gasket Pipe Fittings Suppliers
Rubber flange gasket
Rubber flange gasket
A gasket is a ring made of a material that is plastically deformed and has a certain strength. Most of the gaskets are cut from non-metal plates, or made by professional factories according to the specified size. The materials are asbestos rubber sheets, asbestos sheets, PTFE sheets, polyethylene sheets, etc.; also useful for thin metal sheets (iron sheets, Stainless steel) a metal-clad gasket made of non-metallic materials such as asbestos; a wound gasket made of a thin steel strip and an asbestos tape, the most commonly used is a stainless steel strip and graphite Metal wound gaskets can also be used with asbestos depending on the environment. Ordinary rubber gaskets are suitable for temperatures below 120 °C; asbestos rubber gaskets are suitable for general corrosive applications where the water vapor temperature is below 450 ° C, for oil temperatures below 350 ° C, and pressures below 5 MPa. Medium, the most commonly used is acid-resistant asbestos board. In high-voltage equipment and pipelines, lens or other shapes of metal gaskets made of copper, aluminum, 10 steel, and stainless steel are used. The contact width between the high pressure gasket and the sealing surface is very narrow (line contact), and the sealing surface and the gasket have a high processing finish.
Low-pressure small-diameter wire-bonded flanges, high-pressure and low-pressure large diameters are all welded flanges. The thickness of the flanges of different pressures and the diameter and number of connecting bolts are different.
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